Speed in Gears

[Leveil22]

Ok thanks

 

[arnie_82]

your QC has 4.56 changing to 4.10 would drop highway rpm some. not sure how much! maybe 300 rpm in high gear. easy swap . going taller yet, like 3.91 ,would require a carrier change as well.

If you want 4:10 we could swap.

 

[Leveil22]

whats needed to run a 3.73 and who sells them?

 

[SergioL.]

Here you go. I will double check them this weekend, but I believe they are correct.

4.10 = 1810.0

4.56 = 2055.0

4.88 = 2181.6

5.13 = 2316.8

5.38 = 2471.4

I just got an '04 and it turns 2,000 rpm @ 80mph with stock size tires.

Does this mean a previous owner swapped to 4;56's?

 

[Psycho Mythic]

How about the RPMs you would be turning at 80mph in 6th with the listed gear ratios?

Here you go. I will double check them this weekend, but I believe they are correct.

4.10 = 1810.0

4.56 = 2055.0

4.88 = 2181.6

5.13 = 2316.8

5.38 = 2471.4

4.10 gears @ 80mph = just over 1600rpm in 6th gear...seems you're a couple hundred rpm off bud

4.10 gears @ 75mph = 1500rpm in 6th gear...

My truck has stock size tires (305-40R22's)

 

[mysrt10]

I was out today and I got 1950 rpm @ 80 mph. I was going to post on your thread for yor info.

 

[VENOMOUS1 RACING]

Make sure you take tire diameter into consideration!! 45 series will throw off calculations. Also someone with new tires versus old tires. Does make a slight difference. Ill see what mine says. I have 45s out back and 40s up front.

 

[Psycho Mythic]

Im running stock 305-40R22's

 

[ViperJeff]

This would make John laugh

 

[stealth78]

Make sure you take tire diameter into consideration!! 45 series will throw off calculations. Also someone with new tires versus old tires. Does make a slight difference. Ill see what mine says. I have 45s out back and 40s up front.

You're kinda right... If you are getting your mph reading off of a GPS, then yes it will throw it off. Although if you are running 45's, you will be going faster but your speedometer will not know the difference.

 

[caveman]

You're kinda right... If you are getting your mph reading off of a GPS, then yes it will throw it off. Although if you are running 45's, you will be going faster but your speedometer will not know the difference.

A GPS will show the correct MPH regardless of tire size. The speedometer will read differently with a change in tire size.

Ya'll do realize that calculating RPM, speed, gear ratio, flux capacitor readings, etc, is as simple as using a basic calculator (click here for an example), right?

 

[SrtBrad]

4.10 gears @ 80mph = just over 1600rpm in 6th gear...seems you're a couple hundred rpm off bud

4.10 gears @ 75mph = 1500rpm in 6th gear...

My truck has stock size tires (305-40R22's)

way to tell him 6 years later hahahahah

 

[caveman]

way to tell him 6 years later hahahahah

Threads on the VTCoA never die, they just fade away until somebody bumps them.

 

[SrtBrad]

everyway i do the math on your truck cody it says it has 3.73 for a rear end

 

[caveman]

everyway i do the math on your truck cody it says it has 3.73 for a rear end

Me too, Cody. Check your RPM in 4th gear for a couple different speeds and I bet the numbers work out for a 4.10 though.

 

[SrtBrad]

my loaded tire radius might be off as well

 

[caveman]

my loaded tire radius might be off as well

If it's within in inch, that should get us close.

 

[SrtBrad]

If it's within in inch, that should get us close.

How many times have you told me that haha

 

[stealth78]

A GPS will show the correct MPH regardless of tire size. The speedometer will read differently with a change in tire size.

Ya'll do realize that calculating RPM, speed, gear ratio, flux capacitor readings, etc, is as simple as using a basic calculator (click here for an example), right?

Lol. Sorry bud I knew what I meant just may not have sounded right. YES, your GPS will read true. But what I meant by your speedometer not knowing the difference is... if you have 40 or 45 series tires your speedometer "for say" will read 120 @ 6000rpm, yet with 45 series you will actually be traveling faster. I realize you know this, I just had to post this to reassure myself that I'm not quite as dumb as I made myself sound! MERRY CHRISTMAS GUYS!!! Thanks for all the helpful info and entertaining threads on my first year with the VTCOA!!!

 

[caveman]

First off: Merry Christmas, Everyone!

How many times have you told me that haha

I haven't told you that since yesterday, Lil Guy

Lol. Sorry bud I knew what I meant just may not have sounded right. --- MERRY CHRISTMAS GUYS!!! Thanks for all the helpful info and entertaining threads on my first year with the VTCOA!!!

Gotcha.